I've hated hot weather since I was a kid, but until I was 30 or so cold weather didn't bother me much unless it was really cold, like under 10 degrees Fahrenheit (under -12 Celsius). Over the last few years, though, I've noticed that I dislike the cold more and more as well.
Extrapolating from current trends, I predict that by the time I am 50 I will be extremely uncomfortable, and possibly even dead, anywhere outside the temperature range of 65 - 72 degrees Fahrenheit (18.3 - 22.2 degrees Celsius).
In terms of climate tolerance, I will have become like one of those rare and delicate plants that can only survive under an incredibly narrow range of conditions and quickly wilt and die if anything changes too much. The main difference is that the plants are probably a lot prettier than I am.